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Java Java Basics Perfecting the Prototype Looping until the value passes

Posted by aa116
aa116
1,823 Points

Not Sure on What I Have Done Wrong, Need Help!

My Question is to: Now continually prompt the user in a do while loop. The loop should continue running as long as the response is No. Don't forget to declare response outside of the do while loop.

Example.java 
// I have initialized a java.io.Console for you. It is in a variable named console.
String response = console.readLine("Do you understand do while loops?  ");
String noun;
boolean negative;
 do {
     noun = console.readLine("Do you understand do while loops?  ");
    negative  = (noun.equalsIgnoreCase("No"));
     if (negative) {
       console.printf("Try again \n\n");
        }
      }

1 Answer

jcorum
jcorum
71,830 Points
jcorum
jcorum
71,830 Points

Aimee, while loops start with the keyword while. They need a condition (a boolean expression) inside a set of parentheses. Here the condition is response != "Yes". That is, the loop will run as response is not equal to "Yes", then it will stop. Inside the loop you prompt the user and put the user's response in the variable response. 

String response = "No";

while (response != "Yes") {
  response = console.readLine("Do you understand do while loops?  ");
}
console.printf("Because you said %s, you passed the test!", response);

After the loop quits (when the user enters "Yes") you use a printf statement. printf needs a format specifier for each variable that is to be interpolated. If the variable is a String, the format specifier is %s.

aa116
aa116
1,823 Points

Thank you very much, I now understand